1 files changed, 24 insertions, 0 deletions
diff --git a/libc/test/run-ctype-test.c b/libc/test/run-ctype-test.c
index 5ba76f1c..999292b0 100644
--- a/libc/test/run-ctype-test.c
+++ b/libc/test/run-ctype-test.c
@@ -31,3 +31,27 @@
 #include "../ctype/tolower.c"
 #include "../ctype/toupper.c"
 
+int skiboot_isdigit(int ch);
+int skiboot_isprint(int ch);
+int skiboot_isspace(int ch);
+int skiboot_isxdigit(int ch);
+
+int skiboot_isdigit(int ch)
+{
+	return isdigit(ch);
+}
+
+int skiboot_isprint(int ch)
+{
+	return isprint(ch);
+}
+
+int skiboot_isspace(int ch)
+{
+	return isspace(ch);
+}
+
+int skiboot_isxdigit(int ch)
+{
+	return isxdigit(ch);
+}